is in denver tonight preparing for tomorrow night's big debate. romney took a break today and went out to a chipotle restaurant. while he was there he took a picture. when asked if he was ready for the debate, romney said, getting there. and obama also visited the hoover dam just outside of las vegas. the president said one of his aides mentioned it was just 15 miles away so they decided to go. the president said it was the first time he had ever visited the hoover dam. our coverage begins at 6:00 p.m. >>> the san francisco board of supervisors convened in one week. one week from today to decide once and for all the long running saga of suspended sheriff ross mirkarimi. there are 11 supervisors. ousting mirkarimi would take nine votes. amber lee breaks down the likely vote. >> reporter: history will tell you san francisco is a city that follows its own beat. suspended sheriff ross mirkarimi was fighting for his job almost from the moment he was sworn into office. bruising the arm of his wife led to a lenghtty battle to save his life. >> only in san francisco would it go on for a year.